/*!	 valuenode_gradientrotate.cpp
**	 Implementation of the "Gradient Rotate" valuenode conversion.
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2007, 2008 Chris Moore
**  Copyright (c) 2011 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>
#include <synfig/localization.h>
#include <synfig/valuenode_registry.h>
#include "valuenode_gradientrotate.h"
#include "valuenode_const.h"
#include <stdexcept>
#include <synfig/gradient.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;

REGISTER_VALUENODE(ValueNode_GradientRotate, RELEASE_VERSION_0_61_06, "gradient_rotate", "Gradient Rotate")

synfig::ValueNode_GradientRotate::ValueNode_GradientRotate(const Gradient& x):
    LinkableValueNode(synfig::type_gradient)
{
    Vocab ret(get_children_vocab());
    set_children_vocab(ret);
    set_link("gradient", ValueNode_Const::create(x));
    set_link("offset", ValueNode_Const::create(Real(0)));
}

LinkableValueNode*
ValueNode_GradientRotate::create_new()const
{
    return new ValueNode_GradientRotate(Gradient());
}

ValueNode_GradientRotate*
ValueNode_GradientRotate::create(const ValueBase& x)
{
    Type &type(x.get_type());

    if (type != type_gradient) {
        assert(0);
        throw runtime_error(String(_("Gradient Rotate")) + _(":Bad type ") + type.description.local_name);
    }

    ValueNode_GradientRotate* value_node = new ValueNode_GradientRotate(x.get(Gradient()));

    assert(value_node->get_type() == type);

    return value_node;
}

synfig::ValueNode_GradientRotate::~ValueNode_GradientRotate()
{
    unlink_all();
}

synfig::ValueBase
synfig::ValueNode_GradientRotate::operator()(Time t)const
{
    if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS")) {
        printf("%s:%d operator()\n", __FILE__, __LINE__);
    }

    Gradient gradient;
    gradient = (*ref_gradient)(t).get(gradient);
    Real offset((*ref_offset)(t).get(Real()));
    Gradient::iterator iter;

    for (iter = gradient.begin(); iter != gradient.end(); ++iter) {
        iter->pos += offset;
    }

    return gradient;
}

bool
ValueNode_GradientRotate::set_link_vfunc(int i, ValueNode::Handle value)
{
    assert(i >= 0 && i < link_count());

    switch (i) {
    case 0:
        CHECK_TYPE_AND_SET_VALUE(ref_gradient, type_gradient);

    case 1:
        CHECK_TYPE_AND_SET_VALUE(ref_offset,   type_real);
    }

    return false;
}

ValueNode::LooseHandle
ValueNode_GradientRotate::get_link_vfunc(int i)const
{
    assert(i >= 0 && i < link_count());

    switch (i) {
    case 0:
        return ref_gradient;

    case 1:
        return ref_offset;
    }

    return 0;
}

bool
ValueNode_GradientRotate::check_type(Type &type)
{
    return type == type_gradient;
}

LinkableValueNode::Vocab
ValueNode_GradientRotate::get_children_vocab_vfunc()const
{
    if (children_vocab.size()) {
        return children_vocab;
    }

    LinkableValueNode::Vocab ret;

    ret.push_back(ParamDesc(ValueBase(), "gradient")
                  .set_local_name(_("Gradient"))
                  .set_description(_("The source gradient to rotate"))
                 );

    ret.push_back(ParamDesc(ValueBase(), "offset")
                  .set_local_name(_("Offset"))
                  .set_description(_("The amount to offset the gradient"))
                 );

    return ret;
}